Bourgeois class domination is undoubtedly an historical necessity, but, so too, the rising of the working class against it. Capital is an historical necessity, but, so too, its grave digger, the socialist proletariat.

Freedom is always the freedom of dissenters.

The most revolutionary act is a clear view of the world as it really is.

The masses are in reality their own leaders, dialectically creating their own development process.

Social democracy.. is only the advance guard of the proletariat, a small piece of the total working masses; blood from their blood, and flesh from their flesh.

Only to the rude ear of one who is quite indifferent does the song of a bird seem always the same.

The working classes in every country only learn to fight in the course of their struggles.